Even though it's been three years since Pippa Middlteton almost stole the show during the royal wedding when she stepped out in that curve-hugging dress, we're still not entirely over it.

That's the type of thing that stays with you for a long time! If you're like us and still have a fascination with Pippa's perfect shape, then you'll be happy to know she revealed her secret in her latest column for Waitrose magazine.

For her column, the 30-year-old beauty made Valentine's Day desserts with renowned chef Eric Chavot. Pippa writes about the experience, "Early morning—a tad too early, even for a military-fitness obsessive like me—and I'm in an underground kitchen in London's Mayfair sitting next to a gregarious Frenchman in shorts."

Now, what exactly are British military fitness classes? They're held in parks and open green spaces in England and each class is a mix of running, hill training, strength exercises and partner teamwork—similar to our boot camp classes in the States.

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